Sumitomo Chemical Company, Limited

Nobuo Oi

Tatsuya Miyatake

Toshiki Mori

Masayuki Fujita

Yasuro Suzuki

Yoshinori Seki

Akihiro Kondo

Tsuyoshi Watanabe

Masaaki Nabika

Yuki Iseki

Hiroaki Takahata

Kazuo Kimura

Ryuma Kuroda

Koji Higashi

Hayato Kihara

Kaori Tsubouchi

Keiichi Minakuchi

Kyoko Hino

Hiroshi Toyoda

Eiji Nakaishi

Kenichi Nariyama

Yasuyuki Takagi

Hitoshi Tsukui

A copolymer of a strait chain &#x3b1;-olefin and a vinyl compound (I) represented by the general formula CH&#x2550;CH&#x2014;R, wherein R is a hydrocarbon group, the steric parameter Es of the substituent R is &#x2212;1.64 or less and the steric parameter B1 of the substituent R is 1.53 or more, an adhesive containing the same as an effective ingredient, and an laminate containing the adhesive.

Copolymer, adhesive containing the same and laminate

A process for producing an olefin-based copolymer, which comprises copolymerizing at least one olefin selected from the group consisting of ethylene and straight chain &#x3b1;-olefins, and a vinyl compound (I) and a polyene (II) described below: Vinyl compound (I); a vinyl compound represented by the general formula CH&#x2550;CH&#x2014;R, wherein the substituent R is a saturated hydrocarbon group and steric parameters Es and B1 of the substituent R are respectively &#x2212;1.64 or less and 1.53 or more; and Polyene (II); a compound having two or more of ethylene bonds and at least one combination of two ethylene bonds in which those are bonded to each other through at least three carbon atoms.

Process for producing olefin copolymer

A modified aluminum oxy compound (A) obtained by reacting an aluminum oxy compound (a), water (b) and a compound having a hydroxyl group (c); a polymerization catalyst component comprising the modified aluminum oxy compound; a polymerization catalyst obtained by contacting said modified aluminum oxy compound (A), a transition metal compound (B) and optionally an organoaluminum compound (C) and a specified boron compound; and a process for producing an olefin polymer or an alkenyl aromatic hydrocarbon polymer with the polymerization catalyst.

Modified aluminum oxy compound, polymerization catalyst and process for producing olefin polymer and alkenyl aromatic hydrocarbon polymer

A modified olefin-based copolymer produced by graft-polymerizing an alkenyl aromatic hydrocarbon and/or an unsaturated carboxylic acid or derivative thereof to an olefin-based copolymer containing repeating units derived from a linear &#x3b1;-olefin and/or ethylene copolymer of ethylene and repeating units derived from a vinyl compound (I) or (II) described below, and an adhesive containing the product as an effective ingredient, in which an adhesiveness to an adherend such as olefin resins (e.g. polyethylene, polypropylene) is further improved, are provided. Vinyl compound (I): a vinyl compound represented by the general formula CH&#x2550;CH&#x2014;R, wherein steric parameters Es and B1 of the substituent R are respectively &#x2212;1.64 or less and 1.53 or more. Vinyl compound (II): a vinyl compound represented by the general formula CH&#x2550;CH&#x2014;R', wherein a substituent R&#x2032; is a secondary or tertiary alkyl group.

Modified olefin copolymer

A thermoplastic elastomer composition characterized in that the composition comprises a resin component and at least two kinds of rubber components, wherein at least one kind of the rubber components makes a continuous phase and/or a network-like phase, and the remaining at least one kind of the rubber components makes an isolated phase; and a process for producing the same.

Thermoplastic elastomer composition and process for producing the same

A copolymer of ethylene and a vinyl compound (I) represented by the general formula CH&#x2550;CH&#x2014;R, wherein R is a saturated hydrocarbon group, a steric parameter Es of the substituent R is from &#x2212;2.77 to &#x2212;1.64 and a steric parameter B1 of the substituent R is from 1.53 to 2.90, a molded article comprising the same, an adhesive comprising the same as an effective ingredient an laminate comprising the same.

Copolymer

Modified aluminum oxy compound, polymerization catalyst and process for producing olefin polymer and alkenyl

An optical member comprising a polymer which is amorphous and has a glass transition temperature of not lower than 110&#xb0; C. and optical property parameters O'(&#x221e;)) and O&#x2032;(&#x221e;) that satisfy the following inequality (1),|(&#x221e;)|&#x3c;&#x2212;(&#x221e;)|+&#x2003;&#x2003;(1),is superior in its heat resistance and transparency and high in its stability of optical properties. Therefore, the optical member can be used as, for example, a constituent of optical systems in a liquid crystal display, thereby suppressing change in a display color tone depending on variation of using circumstances of the liquid crystal display.

Optical member and optical product provided therewith

Process for producing vinyl compound polymer

The present invention provides a phase retarder made of a copolymer prepared by polymerizing one non-cyclic olefin monomer (A) selected from ethylene and &agr;-olefin compound having 3 to 20 carbon atoms, one cyclic olefin monomer (B) selected from cyclic olefin compound such as norbornene, and one cyclic vinyl monomer (C) selected from vinyl compound having a cyclic unit made of an aromatic hydrocarbon or an alicyclic hydrocarbon such as styrene or vinylcyclohexane; wherein (1) an amount of the aromatic vinyl monomer is from about 1 to about 20 mol % and a total amount of the non-cyclic olefin monomer (A) and the cyclic olefin monomer (B) is from about 80 to about 99 mol % in case the component (C) is the aromatic vinyl monomer, or (2) an amount of the alicyclic vinyl monomer is from about 80 to about 99 mol % and a total amount of the non-cyclic olefin monomer and the cyclic olefin monomer is from about 1 to about 20 mol % in case the component (C) is the alicyclic vinyl monomer. The present phase retarder makes it possible to conduct uniform polarizing conversion within a wide wavelength range using a single plate.

Phase retarder

A modified aluminum oxy compound(A) obtained by reacting an aluminum oxy compound(a), water (b) and a compound having a hydroxyl group(c); a polymerization catalyst component comprising the modified aluminum oxy compound; a polymerization catalyst obtained by contacting said modified aluminum oxy compound(A), a transition metal compound(B) and optionally an organoaluminum compound(C) and a specified boron compound; and a process for producing an olefin polymer or an alkenyl aromatic hydrocarbon polymer with the polymerization catalyst.

The present invention provides a covering material having a layer formed of a resin of which glass transition point is in the range of 10&deg; C. to 50&deg; C., said covering material having excellent shape keeping ability and shape recovering ability after deformation.

Covering material

A copolymer of (a)ethylene and/or an &agr;-olefin, (b) a cyclic olefin and (c) an alkenyl aromatic hydrocarbon, having acyclic olefin content of 0.01 to 66 mol % and a styrene content of 3 to 99 mol %, wherein the styrene content is more than a half of the cyclic olefin content, a process for producing the copolymer with a specific catalyst and a molded article made from the copolymer. The copolymer and molded article thereof are transparent, and excellent in flexibility and heat resistance.

Copolymer, process for the production thereof, and molded article thereof

A copolymer of ethylene with an alkenyl aromatic hydrocarbon having a content of the alkenyl aromatic hydrocarbon in the copolymer of 0.2 to 60 mol % and a ratio ({circle around (2)}/{circle around (3)}) of the area of a peak {circle around (2)} appearing at 34.0 to 36.0 ppm to the area of a peak {circle around (3)} appearing at 36.0 to 38.0 ppm in a C-NMR spectrum of the copolymer of 0.01 to 0.35, and a molded article comprising the copolymer.

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Narashino, Japan

Nobuo Oi